Press



2 Sheets-'Sheet 2. I'. CHASE.

PRESS (No Modem Patented Apr. 7, 1896.

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W/ TNEEEEE- NIV PHUTUUYHJWASHINGTOMD C,

UNITED STATES PATENT OFFICE..

FRANK CHASE, OF VVATERVILLE, MAINE.

PRESS.

SPECIFICATION forming part of Letters Patent No. 558,011, dated April 7, 1896.

Application iiled September 12, 1895. Serial No. 562,272. (No model.) i

To a/ZZ whom t may concern:

Be it known that I, FRANK CHASE, a citizen of the United States, residing at Waterville, in the county of Kennebec and State of Maine, have invented a new and useful Improvement in Presses, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification, in explaining its nature.

The invention relates to an improvement in presses by which the bed or movable head is provided with a relatively large throw in relation to the stationary head or tool of the press by means of a treadle having a relatively small motion and intermediate connecting devices comprising a primary lever connected with the treadle at one end and with the head at the other end pivoted to a secondary lever land adapted to move the spindle and the bed during the greater part of its movement, and the said secondary lever being adapted to be brought into operation by the action of the first lever in giving the bed or press a powerful closing or finishing movement.

The invention is represented as applied to a machine for pinking or cutting serrations in the toe or heel section of an upper preparatory to lasting them in.

In the drawings, Figure 1 is a view in front elevation' of a press having the features of my invention. Fig. 2 is a view in horizontal section upon the dotted line a; fr of Fig. l and in plan of the parts below said line. Fig. 3 is a view in vertical central section of the press from front to rear; and Fig. 4 is a view principally in side elevation thereof, a part of the frame being broken out to show the position of the levers at the end of the pressing movement.

A is the frame ofthe machine.

base ce, of any desired width, adapted to be mounted upon a bench and to be bolted thereto, and the overhanging head B, having ears b b', the under surface of which is plain or perfectly fiat and acts as a stationary head against which the upper edge c of the pink- It has the ing-knife D is held by the clamping-.studs c and c2, the studs having their lower ends slotted to receive the ends of the pinkingknife, the ends entering the slots and being secured to the studs by screws, and the studs extending through slots `c3 in the ears, by which they are adapted to be moved in or out in relation to each other to vary the curve of the pinking-knife, and the studs being fastened in any desired position to the ears by means of the clamping-nuts c4. The pinkingknife has at its center a hole c5, into which extends a pin c6, fast in the press-frame, (see Fig. 3,) the said pin serving to support the back of the pinking-knife and to center it, it being understood that the knife is made of flat steel bent to a corrugated or zigzag form, (see Fig. 2,) the arc of which may be readily changed by moving its ends inward or outward and the lower edge of which is sharpened. The knife, of course, is stationary, as would be any other part or tool secured to the stationary head.

D is the movable bed or head of the press. It carries a working face d, of soft metal or any suitable material. It is attached to the upper end of the stud or spindle CZ', and it has in its back surface a recess d2, which receives an extension d3 from the press-frame, whereby it is guided and prevented from turning in its vertical movements. The stud or spindle d is supported in bearings formed in the bracket d4 and in the press-frame at d5, and below the bracket, between it and L. a collar d6 on the stud or spindle, is a compression-spring dl, which is compressed by the upward movement of the spindle, and which serves to move downward the spindle and movable head or bed upon the completion of the work and the removal of the cam-section of oneof the actuating-levers from beneath the end of the spindle. ward movement imparted to it, first, by means of the lever E, pivoted at e to the lever E. One end of this lever extends beneath the pin d8, upon which the roll dg at the lower end of the spindle is carried. rlhe other end of the lever is connected by a link or rod e The spindle has up-` With the operating-treadle E2. The lever E is pivoted to the press-frame at e2 below the center of the spindle d', and its short end e3 is practically at a right angle to its arm e4, and its upper surface e5 is tangential to a circle struck from the pivotal point of the lever and forms a cam.

At the end of the long arm e4 of the lever E is a cross-piece or ear e6, against which the lever E is drawn at the end of its head-lifting action. These ears e are used when the lever E is formed as a sort of gate-that is, of two side bars connected with each other by crosspins, so that they straddle at their ends the roll dg and also the ear on the long arm of the lever E and receive the upper end of the link e by a connecting-rod.

The operation of the levers is as follows: The movable head or bed being depressed the levers have the position represented in Fig. 3-that is, the lower end of the primary lever E is beneath the roll-stud of the spindle in a position to lift the spindle. The secondary lever E has its cam end moved out of line with the spindle, so that the end of the spindle may close down by it, and its long arm is inclined upwardly. Upon the application of downward pressure or movement to the outer end of the lever E the spindle and press head or bed are moved rapidly upward, this movement being a relatively rapid one because of the leverage of the lever. When it has very nearly been moved to the point where greater pressure is required for completing the operation of the press, the spindle and its roll have so far lifted that by a farther downward movement of the lever E and treadle the entire pressure is brought to bear upon the lever E, and its cam end then comes in contact with the lower part of the roll and is moved under it, the leverage having been changed from that of the lever E, fulcrumed at e', to that of the levers E and E', fulcrumed at e2, or very much increased. As, however, this largely increased pressure is necessary for only a small part of the throw of the spindle and movable head or bed, this change in leverage does not require that the treadle E2 be provided with much additional throw. It will be seen that there is thus provided means by which, upon a relatively small movement of the treadle E2, the movable head is given quite a large range of movement and without in any way diminishing the degree of power needed at the last end of the stroke, but on the contrary increasing it.

A press having a relatively large throw or movement of the head with increased pressure at the end is very necessary for many kinds of work and especially for serrating or pinkin g toe and heel edges of boot and shoe uppers. A spring F is attached to the frame and to one of levers E or E to lift them and the treadle after the pressing operation is completed. It will be seen that the levers are held in a chamber in the lower part of the press-frame.

Having thus fully described my invention, I claim and desire to secure by Letters Patent of the United States- I. In a press in combination with a stationary head or bed a head or bed movable toward -the stationary head or bed by an actuating mechanism comprising two levers, E, E', the lever E being an accelerating-lever and pivoted to the lever E', and the lever E having a compression-cam adapted to act upon the movable head or bed after the action of the accelerating-lever, as and for the purposes described.

2. In a machine of the character specified the combination of the movable head or bed D, its spindle d', the spring d2 and the levers E, E and treadle E2 connected with the end of the lever E, the lever E being pivoted to the lever E and engaging the spindle d for the principal part of its throw, and the lever E having a compression-cam e5 which engages the spindle at the completion of the actuating movement of the lever E, the said levers being operated successively by a single downward movement of the treadle, as and for the purposes described.

3. The combination in a machine of the character specified of the frame A having an overhanging integral head B, and integral ears b, b extending from each side thereof, the under surface of which head and ears forms the stationary bed of the machine, a curved serrating or pinking knife attached to the said head by means of a pin c5 which enters the hole c6 therein and the clamping-studs c c2 to which the ends of the knife are secured and means for adjusting the curve of said knife comprising slots c3 in the said ears b, b' in which the said clamping-studs are laterally adjustable, in combination with a head or work-support movable toward and from said knife.

4. In a machine of the character specified the combination of the movable head or worksupport D, the treadle, and intermediate connecting devices comprising two levers one of which is pivoted to operate the Work-support relatively rapid for the greater part of its throw, and the other of which is pivoted and shaped to apply relatively slow but more powful movement to the head at the end of its throw substantially as described.

5. The combination of a machine of the character specified of the pressure-head D, its spindle d', the spring C17, the spindle-roll C19, the lever E, pivoted at e2 and having the cam e5 and the long arm e4, the ear e upon said long arm, the lever E pivoted to said ear and having one end in engagement with the spindle e/ during a portion of its throw, and adapted at its other end to come in contact with the end of the lever E and to increase the leverage thereof during the operation of IOO IIO

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pressing-lever and said second compressinglever and means for successively operating 1o them as and for the purposes described.

l FRANK CHASE. In presence 0f WM. MCGRATH, JOHN F, STUCKY. 

